INDEX OF SYMBOLS gib S greatest lower bound 4.2 I closed unit interval 5.2 inf S infimum 4.2 inf„f infimum of f on F 9.3 r J upper index set 6.6, 6.18 K lower index set 6.18 lb S set of lower bounds 4.2 lub S least upper bound 4.2 Q rational numbers 3.2 R real numbers 3.2 S(x,6) open sphere 5.2 S (x,0) almost open sphere 5.7 sup S supremum 4.2 U a-subcontour 6.17 a ub S set of upper bounds 4.2 X a-contour 6.2 A closure 5.2 A complement 4.2 A expansion 5.6 A interior 5.2 -F metric complement 5.2 almost greater than 3.3 0 void set 4.2 fL not an element 4.2 113
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